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arXiv 2503.02001cs.ITmath.IT
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局部q元序列可恢复码的新构造:校验矩阵方法

New Construction of Locally q-ary Sequential Recoverable Codes: Parity-check Matrix Approach

Akram Baghban, Mehdi Ghiyasvand

AI总结:

本文提出一种基于校验矩阵的q元序列局部可恢复码(SLRCs)新构造,通过建立并行与序列恢复的新联系,实现了具有信息$(r, t_i, δ)$-序列局部性的线性码,可对最多$t$个擦除进行序列恢复。

摘要:

本文为分布式存储系统开发了一族新的可恢复码,即采用序列恢复方法处理多重擦除的序列局部可恢复码(SLRCs)。我们提出了并行恢复与序列恢复之间的新联系,从而推导出具有信息$(r, t_i, δ)$-序列局部性的q元线性码的一般构造,其中第$i$个信息符号包含在$t_i$个长度为$(r+δ-1)$且最小距离为$δ$的删余子码中。我们证明此类码为$(r, t)_q$-SLRC($t \geq δt_i+1$),这意味着它们允许对最多$t$个擦除进行序列恢复,每个擦除由$r$个其他码符号恢复。

英文摘要:

This paper develops a new family of locally recoverable codes for distributed storage systems, Sequential Locally Recoverable Codes (SLRCs) constructed to handle multiple erasures in a sequential recovery approach. We propose a new connection between parallel and sequential recovery, which leads to a general construction of q-ary linear codes with information $(r, t_i, δ)$-sequential-locality where each of the $i$-th information symbols is contained in $t_i$ punctured subcodes with length $(r+δ-1)$ and minimum distance $δ$. We prove that such codes are $(r, t)_q$-SLRC ($t \geq δt_i+1$), which implies that they permit sequential recovery for up to $t$ erasures each one by $r$ other code symbols.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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